<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="标题" prop="title">
        <el-input
          v-model="queryParams.title"
          placeholder="请输入标题"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['NexusSphere:slideshow:add']"
        >新增
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['NexusSphere:slideshow:edit']"
        >修改
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['NexusSphere:slideshow:remove']"
        >删除
        </el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['NexusSphere:slideshow:export']"
        >导出
        </el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="slideshowList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center"/>
      <el-table-column label="序号" type="index" align="center"/>
      <el-table-column label="标题" align="center" prop="title"/>
      <el-table-column label="图片" align="center" prop="imageUrl" width="100">
        <template slot-scope="scope">
          <image-preview :src="scope.row.imageUrl" :width="50" :height="50"/>
        </template>
      </el-table-column>
      <el-table-column label="顺序" align="center" prop="imageSort"/>
      <!-- <el-table-column label="状态" align="center" prop="status" /> -->
      <el-table-column label="更新时间" align="center" prop="updateTime"/>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['NexusSphere:slideshow:edit']"
          >修改
          </el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['NexusSphere:slideshow:remove']"
          >删除
          </el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改轮播图对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="标题" prop="title">
          <el-input v-model="form.title" placeholder="请输入标题"/>
        </el-form-item>
        <el-form-item label="跳转路径" prop="httpUrl">
          <el-input v-model="form.httpUrl"/>
        </el-form-item>
        <el-form-item label="图片路径" prop="imageUrl">
          <el-upload
            action="http://localhost:8080/User/oss/upload"
            list-type="picture-card"
            :file-list="uploadFileList"
            :on-remove="handleRemove"
            :on-success="handleSuccess"
            :limit="1"
          >
            <i class="el-icon-plus"></i>
          </el-upload>
          <!-- 图片预览对话框 -->
          <el-dialog :visible.sync="dialogVisible">
            <img :src="form.imageUrl" alt="预览图片"/>
          </el-dialog>
        </el-form-item>
        <el-form-item label="图片顺序" prop="imageSort">
          <el-input-number v-model="form.imageSort" controls-position="right" :min="1"></el-input-number>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listSlideshow, getSlideshow, delSlideshow, addSlideshow, updateSlideshow } from '@/api/NexusSphere/slideshow'

export default {
  name: 'Slideshow',
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 轮播图表格数据
      slideshowList: [],
      // 弹出层标题
      title: '',
      // 是否显示弹出层
      open: false,
      //开关
      is_status: true,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        title: null,
        status: null
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        title: [
          { required: true, message: '标题不能为空', trigger: 'blur' }
        ],
        httpUrl:[
          { required: true, message: '跳转路径不能为空', trigger: 'blur' }
        ],
        imageUrl:[
          { required: true, message: '图片路径不能为空', trigger: 'blur' }
        ]
      },
      uploadFileList: []
    }
  },
  created() {
    this.getList()
  },
  methods: {

    handleRemove(file, fileList) {
      this.form.imageUrl = null
    },
    handleSuccess(response, file) {
      const res = response.msg
      this.form.imageUrl = res
    },

    /** 查询轮播图列表 */
    getList() {
      this.loading = true
      listSlideshow(this.queryParams).then(response => {
        this.slideshowList = response.rows
        this.total = response.total
        this.loading = false
      })
    },
    // 取消按钮
    cancel() {
      this.open = false
      this.reset()
    },
    // 表单重置
    reset() {
      this.form = {
        id: null,
        title: null,
        imageUrl: null,
        imageSort: null,
        updateTime: null,
        createTime: null,
        status: null
      }
      this.uploadFileList = []
      this.resetForm('form')
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1
      this.getList()
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm('queryForm')
      this.handleQuery()
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id)
      this.single = selection.length !== 1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset()
      this.open = true
      this.title = '添加轮播图'
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset()
      const id = row.id || this.ids
      getSlideshow(id).then(response => {
        this.form = response.data
        this.open = true
        this.title = '修改轮播图'

        // 设置 uploadFileList 显示旧图
        if (this.form.imageUrl) {
          this.uploadFileList = [{
            name: '当前图片',
            url: this.form.imageUrl
          }]
        } else {
          this.uploadFileList = []
        }

      })

    },
    /** 提交按钮 */
    submitForm() {
      this.$refs['form'].validate(valid => {
        if (!valid) {
          this.$modal.msgError('表单校验未通过，请重新检查')
          return
        }
      })

      this.$refs['form'].validate(valid => {
        if (valid) {
          if (this.form.id != null) {
            updateSlideshow(this.form).then(response => {
              this.$modal.msgSuccess('修改成功')
              this.open = false
              this.getList()
            })
          } else {
            addSlideshow(this.form).then(response => {
              this.$modal.msgSuccess('新增成功')
              this.open = false
              this.getList()
            })
          }
        }
      })
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids
      this.$modal.confirm('是否确认删除轮播图编号为"' + ids + '"的数据项？').then(function() {
        return delSlideshow(ids)
      }).then(() => {
        this.getList()
        this.$modal.msgSuccess('删除成功')
      }).catch(() => {
      })
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('NexusSphere/slideshow/export', {
        ...this.queryParams
      }, `slideshow_${new Date().getTime()}.xlsx`)
    }
  }
}
</script>
